Indicator.



No. 763,956. I PATENTE'D JULY 5, 1904.

G. A. BROWNE.

INDICATOR.

APPLICATION FILED NOV. 26, 1902.

NO MODEL.

llllllllllllllllllilllllfl 2h UNITED STATES Patented July 5, 1904.

PATENT OEEroE.

INDICATOR.

SPECIFICATION forming part of Letters Patent No. 763,956, dated July 5,1904.

Application filed November 26, 1902. Serial No. 132,925. (No model- ToaZZ whom it may concern.-

Be itknown thatI, GEORGE ALBERT BROWNE, a citizen of the United States,residing at Tacoma, in the county of Pierce and State of WVashington,have invented certain new and useful Improvements in Indicators; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The present invention relates to improvements in indicators or registersfor showing the temperature of crushed-rock rolls; and the object inview is the provision of means for accomplishing such indication throughthe expansion and contraction of the rolls.

The invention consists of a rack connection with the journal of a rolland gearing connected with said rack for rotating an indicating device.

It also consists in certain other novel constructions, combinations, andarrangements of parts, as will be hereinafter fully described andclaimed.

In the accompanying drawings, Figure 1 represents a-view in sideelevation of a dial and indicator-needle with the operating partsthereof inclosed in a suitable housing. Fig. 2 represents a sectiontaken on the plane of line 2 2 of Fig. 1. Fig. 3 represents a sectiontaken on the plane of line 3 3 of Fig. 1 looking in the direction of thearrow, parts being broken away for disclosing the interior structure.

Referring to the drawings by numerals, 1 indicates a journal mounted ina thrust-bearing of any suitable type and connected with a roll designedfor heating crushed rock, into the end of which journal isinserted,'preferably threaded, an arm 2, carrying at its free end acylindrical rack-bar 3, said arm entering any suitable housing 4 andretaining the rack bar within said housing.v Extending from the housing4is a tube 5, carrying a casing 6. Within the housing 4 is journaled ashaft 7, which extends longitudinally through tube 5 into the casing 6and has fixed at its lower end, or that end within the housing 4, agear-wheel 8, meshing with the rack-bar 3, the teeth of the rackbarbeing parallel and annular, so that the arm 2 and rack-bar 3 may be freeto rotate without moving gear 8, but said gear will be rotated uponlongitudinal movement of said rack-bar. The upper end of shaft 7, or theend extending into the casing 6, carriesa fixed and preferably beveledgear 9, meshing with a gear 10, carried by a shaft 11, journaledcentrally of the casing 6 in a spider 12 and carrying at its lower endan indicating-needle 13, moving above any suitable dial 14.

In operation the roll (not shown, but sup ported by the journal 1) isheated and expands longitudinally, moving said journal with its arm 2and rack 3, and thereby rotating gear 8, shaft 7 ,and gears 9and 10.Thus the shaft 11 and needle 13 will be rotatedby the longitudinalmovement of the journal 1, so as to be brought about the face of thedial14 to a distance proportional to the expansion of the said roll, wherebythe degrees of heat within the roll may be indicated. It is notabsolutely necessary that the dial 14 should be employed, a single markof indication being sufficient when placed at the proper point relativeto the circle or are described by the point of the needle 13, the objectbeing the registration ofthe heat of roll supported by journal 1, suchheat being indicated by the needle of pointer 13.

By reference to the drawings it will be observed that the housing 4 maybe provided with any suitable support or supportsas, for instance,laterally-projecting flanges-such as are illustrated, said flanges beingadapted to receive securing means for attaching said housing at anydesired point. It will further be seen that the arm 2 is a solidcylindrical smooth bar projecting into the housing and surrounded by asleeve connected by bolts or otherwise to said housing,constitutingapacking-gland, said sleeve serving to prevent lateral playof the arm and rack carried thereby.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is

1. In a device of the class described,the combination witha rotatingjournal, of a smooth cylindrical arm carried by the end thereof, ahousing spaced from said journal and inclosing one end of said arm, agear within said housing, an annular rack-bar carried by said arm andmeshing With the teeth of said gear and inclosed by said housing,guiding means carried by said housing and surrounding said arm forlimiting the same against lateral play, and indicating means actuated bysaid gear.

2. In a device of the class described, the combination With a journal,of an arm extending from the end thereof, a housing inclosing the freeend of said arm, a packing-gland sur rounding said arm and forming abearing therefor, limiting the same against lateral play, a cylindricalrack-bar extending from the free end of said arm into said housing, agear engaged by said rack-bar, and indicating 5 means actuated by saidgear.

In testimony whereof I hereunto affix my signature in presence of twoWitnesses.

GEORGE ALBERT BROVVNE. Witnesses:

EDWIN CLARK, G. M. FRENCH.

